InetrfaceProducts NXP / Mbed 2 deprecated PCA9956A_Hello

Hello world code for PCA9956A class library. The PCA9956A is a 24-channel Fm+ I2C-bus 57mA/20V constant current LED driver. This program shows its basic operation of PWM and current settings.

Dependencies:   PCA995xA mbed

Please refer to the component page for details

PCA9955B and PCA9956B are I²C-bus controlled 16-channel constant current LED driver optimized for dimming and blinking.

High-level API is available

A high-level API that can be used as the "PwmOut" of bed-SDK is available.
This API enables to make instances of each LED output pins and control PWM duty cycle by assignment.
Output current also controllable by API function.
For detail information, refer API document of LedPwmOutCC Class class which is included in PCA995xA class library.

#include "mbed.h"
#include "PCA9956A.h"

PCA9956A    led_cntlr( p28, p27, 0xC4 );  //  SDA, SCL, Slave_address(option)
LedPwmOutCC led( led_cntlr, L0 );

int main()
{
    while( 1 ) {
        for( float p = 0.0f; p < 1.0f; p += 0.1f ) {
            led     = p;
            wait( 0.1 );
        }
    }
}

main.cpp@3:4b4d1855bcaa, 2015-03-19 (annotated)

Committer:
nxp_ip
Date:
Thu Mar 19 10:49:49 2015 +0000
Revision:
3:4b4d1855bcaa
Parent:
2:9b700bf94085 
Library update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nxp_ip 1:fd208c007499 1 #include "mbed.h"
nxp_ip 1:fd208c007499 2 #include "PCA9956A.h"
nxp_ip 1:fd208c007499 3
nxp_ip 2:9b700bf94085 4 PCA9956A led_cntlr( p28, p27, 0x02 ); // SDA, SCL, Slave_address(option)
nxp_ip 2:9b700bf94085 5 LedPwmOutCC led0( led_cntlr, L0 ); // Instance for LED0 pin
nxp_ip 2:9b700bf94085 6 LedPwmOutCC led1( led_cntlr, L1 ); // Instance for LED1 pin
nxp_ip 2:9b700bf94085 7 LedPwmOutCC led2( led_cntlr, L2 ); // Instance for LED2 pin
nxp_ip 1:fd208c007499 8
nxp_ip 1:fd208c007499 9 int main()
nxp_ip 1:fd208c007499 10 {
nxp_ip 2:9b700bf94085 11 led0.current( 0.5 ); // LED0 pin current output setting to 50%
nxp_ip 2:9b700bf94085 12 led1.current( 0.5 ); // LED1 pin current output setting to 50%
nxp_ip 2:9b700bf94085 13 led2.current( 0.5 ); // LED2 pin current output setting to 50%
nxp_ip 1:fd208c007499 14
nxp_ip 1:fd208c007499 15 while(1) {
nxp_ip 2:9b700bf94085 16
nxp_ip 2:9b700bf94085 17 for ( float p = 1.0; p >= 0.0; p -= 0.01 ) {
nxp_ip 2:9b700bf94085 18 led0 = p; // Set LED0 output PWM dutycycle as 'p'
nxp_ip 2:9b700bf94085 19 wait( 0.01 );
nxp_ip 1:fd208c007499 20 }
nxp_ip 2:9b700bf94085 21
nxp_ip 2:9b700bf94085 22 for ( float p = 1.0; p >= 0.0; p -= 0.01 ) {
nxp_ip 2:9b700bf94085 23 led1 = p; // Set LED1 output PWM dutycycle as 'p'
nxp_ip 2:9b700bf94085 24 wait( 0.01 );
nxp_ip 2:9b700bf94085 25 }
nxp_ip 2:9b700bf94085 26
nxp_ip 2:9b700bf94085 27 for ( float p = 1.0; p >= 0.0; p -= 0.01 ) {
nxp_ip 2:9b700bf94085 28 led2 = p; // Set LED2 output PWM dutycycle as 'p'
nxp_ip 1:fd208c007499 29 wait( 0.01 );
nxp_ip 1:fd208c007499 30 }
nxp_ip 1:fd208c007499 31 }
nxp_ip 1:fd208c007499 32 }